https://doi.org/10.1051/epjconf/202328706007
Critical coupling in Cavity Resonator Integrated Grating Filters (CRIGFs) for SHG control
1 LAAS-CNRS, Université de Toulouse, CNRS, 7 Avenue du Colonel Roche, 31400 Toulouse, France
2 Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, F-13013 Marseille, France
* e-mail: olivier.gauthier-lafaye@laas.fr
** e-mail: stephane.calvez@laas.fr
*** e-mail: antoine.monmayrant@laas.fr
**** e-mail: elizabeth.j.hemsley@gmail.com
† e-mail: anne-laure.fehrembach@fresnel.fr
‡ e-mail: popov@fresnel.fr
Published online: 18 October 2023
We demonstrate experimentally critical coupling for nonlinear conversion in grating-coupled Fabry-Pérot planar microcavities known as Cavity-Resonant Integrated Grating Filters (CRIGFs). Novel asymmetric designs offer Q-factors from 1000 to 7000 and allow critical coupling with maximised SHG. We developed an improved coupled-mode model for the linear and non-linear spectral response of CRIGFs which allows accurate insight on the intrinsic and coupling losses in these microcavities.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
